Need. Non-destructive testing refers to the analysis of the structure, nature and state of the interior and surface of the specimen, as well as the types, nature, quantity, shape, location and size of defects, with the help of modern technology and equipment and through physical or chemical methods, on the premise of not destroying or affecting the use performance of the detected object and not hurting the internal organization of the detected object. Personnel engaged in nondestructive testing need to undergo professional training, pass the examination and obtain qualifications before they can take up their posts with certificates. Various countries, regions and institutions have different requirements for the qualification certification of nondestructive testing training. Understand clearly before training, and select appropriate standards and institutions for relevant training and assessment.